DefenceTalkARNOLD AIR FORCE BASE: The Pratt & Whitney F135 engine has returned to Arnold Engineering Development Complex for another round of testing, with a fresh engine component the focus of the latest efforts. The F135, which powers the F-35 Lightning II aircraft, is currently undergoing testing in one of the Sea Level Test Cells at […]https://www.defencetalk.com/us-air-force-tests-new-rotor-design-for-f-35-engine-73298/